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PSU Won't Jump Start Anonymous Wed Apr 8 13:48:32 2020 No.1794666 [Reply] [Original]

Just got this PSU from a friend for free to be converted into a cheap lab bench power supply. However, when I try to short the Green and Black wires the unit won't start The unit works fine, was running in a computer prior to me receiving it. I've heard that there may be some sort of protection circuit and/or that the unit requires a dummy load

>>	Anonymous Wed Apr 8 13:52:12 2020 No.1794669 >>1794666 >for free Why?

>>	Anonymous Wed Apr 8 13:54:00 2020 No.1794673 >>1794669 He got a new one and didn't need this one anymore

>>	Anonymous Wed Apr 8 14:03:27 2020 No.1794676 >>1794673 >He got a new one Why?

>>	Anonymous Wed Apr 8 14:07:05 2020 No.1794679 >>1794676 idk. I just want to figure out how to jump start it

>>	Anonymous Wed Apr 8 14:19:15 2020 No.1794686 >>1794666 "jump start" is what you do to a car. This aint a car.

>>	Anonymous Wed Apr 8 14:47:35 2020 No.1794706 >>1794666 http://static.highspeedbackbone.net/pdf/ULT-LSP650_Manual.pdf I would be looking at pin 8 on the motherboard connector. Looks like a shutdown for out of range power situations.

>>	Anonymous Wed Apr 8 15:20:50 2020 No.1794719 >>1794666 Generally they need a dummy load (resistor between the correct pins) Bought one of these a few years ago and it works really well https://www.sparkfun.com/products/12867

>>	Anonymous Wed Apr 8 15:25:38 2020 No.1794724 >>1794719 >just looked at the price Shit, I'm pretty sure I originally got that for way less than twenty bucks.

>>	Anonymous Wed Apr 8 15:26:32 2020 No.1794726 >>1794719 yeah someone else recommended one of those too. Might just go that route and cut my losses

>>	Anonymous Wed Apr 8 17:32:29 2020 No.1794784 >>1794719 >>1794726 You can get these for a couple of bucks from Aliexpress

>>	Anonymous Wed Apr 8 17:38:06 2020 No.1794791 >>1794784 Yep Ebay too

>>	Anonymous Thu Apr 9 06:39:00 2020 No.1795026 >>1794719 Can also be the load. As in, wire up your LED lights or whatever first, then flick the switch. Sees the lights as a viable load, goes.

>>	Anonymous Thu Apr 9 09:05:59 2020 No.1795056 >>1794666 Throw a 5 ohm 10 watt resistor or equivalent between the +5v and ground to create a dummy load. I found it on an instructable and it worked for me when I was making a boombox with an ATX psu.

>>	Anonymous Thu Apr 9 10:58:16 2020 No.1795098 >>1795056 Yeah I was thinking that too. Thanks

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